Great extension, but with some minor issues.
I set up a black squat theme on Firefox, but every time I restart my browser, Firefox's main page will change back to bright. I think this is caused by this extension, I hope you can fix it, thank you!
In addition, in the search engine of Baidu(www.baidu.com), it only works on the first page, and all following pages are changed back to bright.

Interferes with Firefox browser, not enough customization for prime time for me, and as everyone else mentioned, it slows performance.

I think this is the best add on for changing web page color :D

I like very much the keyboard shortcut resource. Thanks!

The performance is extremely poor. The browser slows down of a great deal.

Been using this for a while now, while it is one of the few that actually works, it slows down browsing by a LOT. PLEASE PLEASE fix this